Moon's74
Full Member
Just some information for all the TA lovers/haters out there.
History:
I've got an 89' 5.0 with 289 performer intake, MSD mechanical dizzy and ignition, and an E303 cam advanced 4 degrees.
Started out with TA 470 stumbling all the time and loading up. Got the same story from Hollley about the 470 being too small and they sent me a 670. Same problems for just over 2 years. Plenty of jet kits, spring kits, pump cam kits, timing changes, etc...no change.
A lot of guys on here seem to have good luck with them and a lot have bad luck, like me. I borrowed a friends junk yard 1850-3, 600cfm manual choke, and rebuilt it. Night and day. Runs awesome, no hesitation or load up.
OK, so I called Holley this morning. Reggie said that the later model 670's, 670-2, have check valves in the metering blocks under the plugs on top...not removable or changable. Well apparently in the early model 670-2's these check valves sometimes, or more times than not IMO, flipped over and caused the off idle hesitation as well as loading at idle and off idle. He said the newer metering blocks have check valves that cannot flip over and this takes care of all the problems.
Long story short, he is sending me both new, primary and secondary, metering blocks for no charge and told me this WILL take care of it. I'm crossing my fingers.
Just thought I should let everyone know in case someone else needs to do this. I'll post results as I get them.
Moon's
History:
I've got an 89' 5.0 with 289 performer intake, MSD mechanical dizzy and ignition, and an E303 cam advanced 4 degrees.
Started out with TA 470 stumbling all the time and loading up. Got the same story from Hollley about the 470 being too small and they sent me a 670. Same problems for just over 2 years. Plenty of jet kits, spring kits, pump cam kits, timing changes, etc...no change.
A lot of guys on here seem to have good luck with them and a lot have bad luck, like me. I borrowed a friends junk yard 1850-3, 600cfm manual choke, and rebuilt it. Night and day. Runs awesome, no hesitation or load up.
OK, so I called Holley this morning. Reggie said that the later model 670's, 670-2, have check valves in the metering blocks under the plugs on top...not removable or changable. Well apparently in the early model 670-2's these check valves sometimes, or more times than not IMO, flipped over and caused the off idle hesitation as well as loading at idle and off idle. He said the newer metering blocks have check valves that cannot flip over and this takes care of all the problems.
Long story short, he is sending me both new, primary and secondary, metering blocks for no charge and told me this WILL take care of it. I'm crossing my fingers.
Just thought I should let everyone know in case someone else needs to do this. I'll post results as I get them.
Moon's